Page 168 - NUMINO Challenge_C1

2 Draw a line that bisects the side on the opposite 4

of the vertex. A

AA

15 Perimeter and Area of Figures p.128~p.129

Creative Thinking p.126~p.127 34
smaller, 34, smallest
Example 8, 9, 72

1 Find the congruent figure and move it to the

colored location.

Example greatest
smaller, 4, 5
perpendicularly, 4, 5, 4, 5, 10

(10 7) 7 490 cm2

2 The colored region in figure A is half of each 4 cm 4 cm 5 cm
5 cm 5 cm 4 cm

square. Therefore, the area of the colored

region is 1 of the total area. The area created
2

when drawing a line that passes through the

center of both squares is equal to the area of Type 15-1 Using Sticks to Make a Rectangle p.130~p.131

the colored region.

Answers will vary. 1 1 2 3 4 5 6 7 8 9 45. Since the
perimeter must be an even number and the area
3 The figures marked with the same shape have must be the greatest, leave out the 1 cm stick to
make the perimeter 44 cm.
the same area.
2 The area is the greatest when the width is the
same as the length. 44 4 11, so the width
and length should both be 11 cm.

3 9 cm 2 cm
3 cm
6 cm

Therefore, the area of the colored region is 5 cm 8 cm
equal to the area of the parallelogram. So the 7 cm 4 cm
area is 100 cm2.

Answers will vary.

Answer Key